Author: Dann Corbit
Date: 10:39:52 09/17/99
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On September 17, 1999 at 13:16:37, Dann Corbit wrote: >On September 17, 1999 at 03:06:15, Dave Gomboc wrote: >[snip] >>I want to represent possible unmoves to allow backpropagation of scores from a >>position to all of its previously visited predecessors. I want to avoid the >>recomputation of possible unmoves at each node visit, and I would like to >>associate other data with each such connecting edge. >> >>It would be possible for me to invent some notation for my own use easily >>enough; I thought there might be a few other people with a desire for a standard >>unmove notation. >Why not just use ordinary PGN put a minus sign in the front? Pawn captures >might be a bit funny, and the opposite of a4 would be -a3, but it seems like it >would work. For "untake" why not use a division sign instead of an x? ;-) You could also use the promotion description if the piece returned to the board is ambiguous: E.g.: -Q/a3=B (queen goes back to a3, returning the captured bishop to the current square.)
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